terriajs/buildprocess/watchWebpack.js

Geospatial data visualization platform.

const notifier = require("node-notifier");

/**
 * Start webpack in watch mode
 */
function watchWebpack(webpack, config, _doneCallback) {
  // webpack is passed as a parameter instead of require-in because otherwise, when TerriaJS is npm link'd,
  // node will end up loading two copies of webpack.  That causes problems with some plugins (e.g. dedupe).
  const wp = webpack(config);
  wp.hooks.watchRun.tap("NoteStart", function () {
    console.log("STARTING INCREMENTAL WEBPACK");
  });
  wp.watch({}, function (err, stats) {
    if (stats) {
      // Fairly minimal output for 'gulp watch'.
      console.log(
        stats.toString({
          colors: true,
          modules: false,
          chunkModules: false,
          version: false,
          hash: false,
          chunks: true,
          assets: false
        })
      );
      console.log("DONE INCREMENTAL WEBPACK");

      const jsonStats = stats.toJson();
      if (err || (jsonStats.errors && jsonStats.errors.length > 0)) {
        notifier.notify({
          title: "Error building TerriaJS specs",
          message: stats.toString({
            colors: false,
            hash: false,
            version: false,
            timings: false,
            assets: false,
            chunks: false,
            chunkModules: false,
            modules: false,
            children: false,
            cached: false,
            reasons: false,
            source: false,
            errorDetails: true,
            chunkOrigins: false
          })
        });
      }
    }
  });
}

module.exports = watchWebpack;